Rockhounding in Morton County, North Dakota

1 mapped rockhounding spot in Morton County. Most commonly produces agate, chalcedony, chert, teredo petrified wood.

Morton County rockhounding photos

Representative spot and material photos from this county, shown where verified public image records are available.

1 photo

Reconstructed Mandan earthlodges at On-A-Slant Village, Fort Abraham Lincoln State Park near Mandan, Morton County, North Dakota — MandanMorton County, North Dakota

Minerals reported in Morton County

Standout in Morton County

Hand-picked spot in Morton County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.

Top pick
Mandan
Public
Morton County
Mandan lies in the Cannonball Formation belt that produces Teredo-bored petrified wood, North Dakota's state fossil: ancient driftwood riddled by marine shipworms and later silicified.
Agate, Chalcedony, Chert, Teredo Petrified Wood

Spots in Morton County

Spot	Minerals	Coordinates	Access
MandanSunny Place South	Agate Chalcedony Chert Teredo Petrified Wood	46.8174, -100.9353	Public

Neighboring counties in North Dakota

Adjacent rockhounding counties, ranked by how close their centroids sit to Morton County. A natural extension if Morton County is already on your trip plan.

Across the state line from Morton County

Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into North Dakota.

Morton County FAQ

Where can I rockhound in Morton County, North Dakota?+

RockHoundR tracks 1 rockhounding spot in Morton County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Morton County?+

Spots in Morton County most often produce Agate, Chalcedony, Chert, Teredo Petrified Wood. Individual spots can vary widely.

Are these Morton County rockhounding spots on public land?+

Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out — links in the app open the right BLM, USFS, or county pages.

Plan a Morton County rockhounding trip

Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.